A Point Source Emits Sound Waves with a Power Output

question 50

Multiple Choice

A point source emits sound waves with a power output of 100 watts. What is the sound level (in dB) at a distance of 10 m?

• A) 139
• B) 119
• C) 129
• D) 109
• E) 10

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Definitions:

Organic Explosives

Explosive materials composed of organic chemicals that produce a detonation or rapid expansion of gases to generate destructive effects.

Combustion

A chemical reaction that occurs when a substance reacts with oxygen to give off heat and light, often producing flame.

Explosives

A rephrased definition: Chemical compounds or mixtures that release a large amount of energy in a very short time through blasts or combustion.

Carbon Dioxide

A colorless, odorless gas with the formula CO2, produced by burning carbon and organic compounds and by respiration.